Don't track mouse events in HWNDMessageHandler when they are forwarded by the LegacyRenderWidgetHost

ui/views/win/hwnd_message_handler.cc

Index: ui/views/win/hwnd_message_handler.cc
===================================================================
--- ui/views/win/hwnd_message_handler.cc	(revision 249488)
+++ ui/views/win/hwnd_message_handler.cc	(working copy)
@@ -788,7 +788,6 @@
 }
 
 void HWNDMessageHandler::SetCapture() {
-  DCHECK(!HasCapture());

[sky, 2014/02/12 14:36:31]

What did the call stack look like when you hit this?

   ::SetCapture(hwnd());
 }
 
@@ -1296,7 +1295,8 @@
 }
 
 void HWNDMessageHandler::OnCaptureChanged(HWND window) {
-  delegate_->HandleCaptureLost();
+  if (!HasCapture())
+    delegate_->HandleCaptureLost();
 }
 
 void HWNDMessageHandler::OnClose() {
@@ -1625,7 +1625,6 @@
     // be WM_RBUTTONUP instead of WM_NCRBUTTONUP.
     SetCapture();
   }
-
   MSG msg = { hwnd(), message, w_param, l_param, GetMessageTime(),
               { CR_GET_X_LPARAM(l_param), CR_GET_Y_LPARAM(l_param) } };
   ui::MouseEvent event(msg);